Abstract
Various Ln- α -Sialon (where Ln=yttrium and lanthanide elements) powders were prepared by reacting mixtures of amorphous Si3N4, AlN, Al2O3 and Ln2O3 powders at high temperatures. The x-value in the chemical formula of Lnx (Si, Al)12 (O,N) 16 was determined by the Rietveld analysis of the X-ray diffraction pattern and was found to increase with decreasing radii of Ln3+ ions. Pressureless sintering of the mixttires of Ln-α-Sialon and α -Si3N4 powders was performed and highly dense Ln-SiALON-based ceramics were obtained. Bending strength of Ln-Sialon-based ceramics was increased with decreasing radii of Ln3+ ions. It was concluded that thermo-mechanical properties of Sialon-based materials could be much improved by the selection of Ln elements.
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© 1992 Elsevier Science Publishers Ltd and MPA Stuttgart
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Yamada, T., Nakayasu, T., Takahashi, T., Yamao, T., Kohtoku, Y. (1992). Preparation of Ln-α-Sialon Powders and Sintering Behavior. In: Carlsson, R., Johansson, T., Kahlman, L. (eds) 4th International Symposium on Ceramic Materials and Components for Engines. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2882-7_74
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DOI: https://doi.org/10.1007/978-94-011-2882-7_74
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